87. His teaching _____ was raised to twelve hours a week in college.
Dry weather______the peasants’harvest this year.
This is a______ but extremely difficult technology in the future.
They only hear while their hands and eyes are_________ occupied.A other than B. no other than C. otherwise D. other ways
No sound and no voice______ for a while.
In America, ______ car is ______ popular means of transportation.